OSH Parser Performance

We time $sh -n $file for various files under various shells, and repeat then run under cachegrind for stable metrics.

Source code: oil/benchmarks/osh-parser.sh

Raw files

Summary

Instructions Per Line (via cachegrind)

Lower numbers are generally better, but each shell recognizes a different language, and OSH uses a more thorough parsing algorithm. In thousands of "I refs".

shell label total lines thousand irefs per line
bash 118,863 15.1
dash 111,674 2.3
osh-native 118,863 13.2
osh-native-souffle 118,863 11.5

(zsh isn't measured because zsh -n unexpectedly forks.)

Average Parsing Rate, Measured on Two Machines (lines/ms)

Shell startup time is included in the elapsed time measurements, but long files are chosen to minimize its effect.

shell label total lines host no-host
dash 111,674 2,699
bash 118,863 680
osh-native-souffle 118,863 499
osh-native 118,863 444
osh-cpython 118,863 12

Per-File Measurements

Time and Memory

shell label elapsed ms user ms sys ms max rss MB num lines filename
dash 2 2 0 1 2,698 Build.sh
bash 5 0 5 3 2,698 Build.sh
osh-native-souffle 7 7 0 8 2,698 Build.sh
osh-native 8 8 0 8 2,698 Build.sh
osh-cpython 268 252 16 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 5 6 0 3 2,512 abuild
osh-native-souffle 8 4 4 8 2,512 abuild
osh-native 9 9 0 8 2,512 abuild
osh-cpython 360 320 40 21 2,512 abuild
dash 8 8 0 2 20,489 configure
bash 32 32 0 3 20,489 configure
osh-native-souffle 39 35 4 20 20,489 configure
osh-native 44 36 8 21 20,489 configure
osh-cpython 1,765 1,709 56 42 20,489 configure
dash 21 21 0 2 69,779 configure-coreutils
bash 83 75 8 3 69,779 configure-coreutils
osh-native-souffle 130 94 31 50 69,779 configure-coreutils
osh-native 149 133 16 46 69,779 configure-coreutils
osh-cpython 5,125 5,053 72 86 69,779 configure-coreutils
bash 6 6 0 3 2,029 configure-helper.sh
osh-native-souffle 6 6 0 8 2,029 configure-helper.sh
osh-native 7 0 6 8 2,029 configure-helper.sh
osh-cpython 258 226 32 21 2,029 configure-helper.sh
dash 2 0 2 1 1,733 functions
bash 4 0 4 3 1,733 functions
osh-native-souffle 6 6 0 8 1,733 functions
osh-native 6 3 3 8 1,733 functions
osh-cpython 251 230 21 20 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 17 0 4 9,661 ltmain.sh
osh-native-souffle 18 7 11 15 9,661 ltmain.sh
osh-native 20 16 4 15 9,661 ltmain.sh
osh-cpython 823 791 32 28 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 3 3 0 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 4 0 7 1,679 t4014-format-patch.sh
osh-native 4 0 4 7 1,679 t4014-format-patch.sh
osh-cpython 94 77 16 18 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 0 4 7 3,123 t9300-fast-import.sh
osh-native 4 4 0 7 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 99 75 23 18 3,123 t9300-fast-import.sh
bash 15 11 4 3 5,160 test-cmd-util.sh
osh-native-souffle 16 4 12 12 5,160 test-cmd-util.sh
osh-native 18 13 4 12 5,160 test-cmd-util.sh
osh-cpython 746 730 16 27 5,160 test-cmd-util.sh

Instruction Counts

shell label irefs num lines filename
dash 6,416,010 2,698 Build.sh
osh-native-souffle 32,898,097 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,365,603 2,698 Build.sh
dash 7,042,147 2,512 abuild
osh-native-souffle 38,710,557 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native 44,966,750 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,435,160 20,489 configure
osh-native 255,014,485 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,570,364 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native 917,366,613 69,779 configure-coreutils
osh-native-souffle 26,502,822 2,029 configure-helper.sh
osh-native 30,479,494 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,813,719 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,746,857 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,272,813 9,661 ltmain.sh
osh-native 112,746,438 9,661 ltmain.sh
bash 172,930,991 9,661 ltmain.sh
dash 3,166,564 1,679 t4014-format-patch.sh
osh-native-souffle 10,802,458 1,679 t4014-format-patch.sh
osh-native 11,808,933 1,679 t4014-format-patch.sh
bash 25,314,918 1,679 t4014-format-patch.sh
dash 4,357,271 3,123 t9300-fast-import.sh
osh-native-souffle 12,665,810 3,123 t9300-fast-import.sh
osh-native 13,869,899 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,248,249 5,160 test-cmd-util.sh
osh-native 111,863,211 5,160 test-cmd-util.sh
bash 161,950,200 5,160 test-cmd-util.sh

Shell and Host Details

shell label shell id
bash bash-d58b84c7
dash dash-0ebcf347
osh-cpython osh-7e65e287
osh-native osh-5d8a18cc
osh-native-souffle osh-native-souffle-eb24ef09
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2024-10-31__05-33-21.cachegrind.tsv
no-host.2024-10-31__05-33-21.times.csv